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Lake Treatments 2024

The following is a new requirement for treatment notices for treatments in 2024.

Business and Residential Notice

This notice is delivered to residents and businesses that are within the treatment zone or within 1⁄4 mile of a treatment zone.

Distribution Date: 15 April 2024

Steilacoom Lake waters and shoreline will/may be treated MULTIPLE times with aquatic herbicide and algaecides between the dates of 25 April 2024 and 30 September 2024. All days/weeks WILL NOT incur treatment. Shoreline Notifications will be posted prior to or days of treatment.

Product(s) planned for use: Fluridone, Tribune, Aquathol K, Imazapyr, 24D, Flumigard, Hydrothol and ZV Iron Active ingredient(s): Fluridone, Diquat Dibromide, Dipotassium Salt of Endothall, Isopropylamine salt of

Imazapyr, Dimethylanine Salt of 2, 4-Dichlorophenoxyacetic Acid, Flumioxazin and Mono-Salt of Endothall

Plants/Algae targeted: Any Noxious vegetation throughout the waterbody along with nuisance vegetation including Large Leaf Pondweed, Watershield and water lily. Algae will be controlled throughout the year to reduce the chances of harmful algae blooms.

Location of treatment(s): Different locations around the lake will be treated for vegetation. Iron will be strategically applied throughout the waterbody to reduce the phosphorous load. Algae may be treated throughout the whole waterbody if required.

The applicator will post signs in the treated and potentially affected areas no more than 48 hours prior to treatment. The signs will describe any water use restrictions or advisories.

If you are withdrawing water for potable or domestic water use, livestock watering, or irrigation, and have no alternate water source, please contact Northwest Aquatic MANAGEMENT at or calling (360) 890-2854 to arrange an alternate water supply.

If you want additional notification prior to treatment, or have further questions, please contact me using the information above.

This herbicide treatment is regulated under a permit issued by the Washington State Department of Ecology. Permit No. WAG994057